Fuse holder



Oct. 5 1926.

C. T. HENTSCHEL FUSE HOLDER Filed July 9. 1924 inventor: Charla-ST.Hentschel,

His Attohrw ey.

Patented Oct. 5, v1926.

UNITED YSTATES l 1,602,221 Parietti-'r` OFFICE.

CHARLES T. HENTSCHEL, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL l'ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

FUSE HOLDER.

Application led July 9,

My invention relates to fuse holders and has for its object theprovision of a fuse holder embodying a closed protective casing for thefuse and' contact parts such that the fuse may be easily and quicklyinserted and removed.

My invention has particular application in installations in which it isdesired for urposes of accessibility to mount the fuse 1n an exposedposition, such as on the front of a switchboard. In carrying out myinvention I mount the fuse 1n a casing pro# vided with a quicklydetachable cover, the contact clips for the fuse being secured to thecasing and cove-r respectively and bein so arranged that the fuse may beinserte and removed with the cover.

For a more complete understanding of my invention, reference should behad to thel accompanying drawing in which Fig. 1 is a side elevationview of a fuse holder embodying my invention; while Fig. 2 is asectional view taken along the line 2-2 of Fig. 1 looking in thedirection of the arrows.

Referring to Figs. 1 and 2 of the drawing, I have shown my invention inone form as being mounted on a suitable support 10 which may be aswitchboard panel. The fuse holder comprises a hollow cylindricalreceptacle member or body 11 made of a suitable insulating material,such as a bakelized compound. One end of the body 11 is closed'; asshown, the left-hand end is closed. The

member 11 is mounted in an aperture 12 ins the support 10 and isprovided with a fiange 13 which is seated on the support. It is held inplace on the support by means of a. tubular member 14 which is slippedover the open end of member'll onto the flange 13 and is provided with aflanged base 15 through which screws 16 extend into the support 10 tohold the member 14 in place thereon. Preferably a gasket 17 is providedunder the base of member 14 whereby the Vmember 11 is clamped firmly inplace and a water-tight joint formed.

Mounted on the bottom or end wall 18 of the member 11 .is a fuse contactclip or rece tacle 19 which is provided with a terminaI 20 extendingoutward through the wall 18. As shown, the terminal 20 is provided witha head which engages the outside of wall 18 and has its inner end peenedover to secure the contact clip in place. .The contact clip comprises aplurality of resili- 1924. Serial No. 735,059.

inward against the fuse. A helical spring 24 is provided in the contactclip 19. This sprin 1s compressed when the fuse is inserte and thustends to force the fuse out.

The contact clip 25 for the opposite end of the fuse is carried on a capor cover 26 which closes the member 11. This cover comprises a block ofinsulating material 27, such as bakelite, which fits in abutting rela-`tion on the member 11 and is provided with a metallic cylindrical skirt28 which ts over the'member 14 and is secured thereto by means of abayonet joint consisting of suitably shaped slots 29 and 30 in the skirtwith which cooperate projections 31 and 32 on the member 14. The skirtmay be secured to the insulating body 27 by bending its outer end 33inward and embedding it in the insulating body when the body is molded.In the inner end of the insulating body is a recess 35 in which thecontact clip 25 is secured, for example, by riveting or other-Y" wisesecuring it to a metallic body 36 which is embedded in the insulation.The contact clip 25 is similar in form to contact clip 19. Electricallyconnected to the clip 25 at its base are four spaced contact arms 37.These contact arms are longer than the contact projections of the` clip25 and extend into the member 11 for a short distance into en gagementwith a contact ring 38 of suitable electric conducting material which isseated on an insulating ring 38 in the outer end of member 11, t e sunkto receive the ring 38. This contact ring is secured in place by meansof two or more insulated rods 39 and 40 of electrical conductingmaterial which extend. lengthwise of member 11 through insulatin tubes39a and 40 lying in grooves provi ed for' member 11 being counterthem inmember 11 and through the end -cover and the cover put in place, asshown in Fig. 2, a circuit is closed from terminal 20 through the fuse,contact arms'37, contact ring 88, and the rods 39 and 40 to the terminal42.

In inserting a fuse, the cover 26 is removed and one end of the fuseinserted in clip 25. The contact arms of the clip exert Suiiicientpressure to hold the use so that it may be inserted into the enclosingportion of the holder formed by member ll by grasping the cover, thecover being put in place at the same time. The cover is then turnedslightly to lock it. Preferably the cover is provided with a iiattenedprojection 43 forming a nger hold to i'acilitate its aplication andremoval. The removal of the use is facilitated bythe spring 24 whichtends to expel the fuse from clip 19T so that the :fuse remains in theclip 25 and is removed with the cover.

In the application of my invention it is contemplated that the terminals20 and 42 by means of which the fuse -is connected in the electriccircuit to be protected will be behind the panel board l0. The exposedportion of the fuse holder on the opposite side of the panel, board isclosed whereby the fuse and contact parts are protected. It will beobserved thatthe fuse while completely enclosed is at the same timereadily accessible so that itmay be easily and quickly inserted andremoved.

While I have described my invention as embodied in concrete form and asoperating in a specific manner in accordance with the provisions of thepatent statutes, it should be understood that^I do not limit myinvention thereto, since various modifications thereof will suggestthemselves to those skilled in the art without departing from thespiriti of my invention, the scope of which is set forth in the annexedclaims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 1. A use holder comprising an insulating body providing achamber for the fuse, electric terminals on said body, a contactreceptacle in said chamber connected to one of said terminals, a contactring secured in the outer end of said chamber connected to the `otherterminal, a cover fitting on said bod)T so as to close said chamber, acontact recep said receptacle, a pair of contact clips se- 05 ried bysaid cover, said contact arms bein arranged to engage said ring when saicover is placed on said receptacle, and means for securing said cover onsaid receptacle whereby said fuse isheld in said clips.

3. A fuse holder comprising an elongated recept-acle for the fuse, acover for said receptacle, a pair of contact clips secured to the bottomof said receptacle and said cover respectively, a ring of conductingmaterial secured in the outer end of said receptacle a pair of terminalssecured exteriorly to t e bottom of said receptacle, electricalconnections between one ot' said terminals and the contact clip on thebottom of said receptacle, electrical connections between the other ofsaid terminals and said ring, a resilient contact arm secured to saidcover in electrically conducting relation to the contact slip carried bysaid cover, said contact arm bein arranged to engage said ring when saicover is placed on said receptacle, and a bayonet joint between saidcover and said receptacle whereby said cover can be secured by turningit after it has been placed on said receptacle.

4. A fuse holder comprising an elongated receptacle for the fuse, means.for securing said receptacle centrally in an aperture in a supportingbody so that its closed and open ends project from opposite sides ofsaid supporting body, a cover fitting on said receptacle, a pair of fuseclips in said receptacle secured respectively to the closed end andcover of said receptacle, a pair of electrical. terminals securedexteriorly on the closed end of said receptacle, electrical connectionsbetween one of said terminals and the fuse clip on the closed end ofsaid receptacle, a contact ring secured in the outer end of saidreceptacle, electrical connections between the other terminal and saidring and a .resilientcontact arm secured to said cover in electricalconducting relation tothe contact clip carried by said cover, saidcontact arm being arranged to engage said ring when said cover is put inplace. y,

In witness whereof, I have hereunto set my hand this 8th day of Jul1924.

CHARLES T. H NTSCHEL.

